Numerical Simulation of Steel Reinforced Lightweight Aggregate Concrete Beams Based on Analysis of Push-out Test
DOI:
https://doi.org/10.56748/ejse.24549Keywords:
Section Steel, Lightweight Aggregate Concrete, Push-out Test, Numerical Simulation, BeamAbstract
To study the influence of bond-slip on the numerical simulation of steel reinforced lightweight concrete(SRLC) members, the push-out test and finite element analysis are carried out first, and then the nonlinear finite element simulation of SRLC beams is conducted. The calculated results are compared with the experimental results. Four factors as the concrete protective cover thickness, stirrup ratio, concrete strength and anchorage length of section steel are considered in test. The constitutive relation of interface bonding slip between the section steel and light concrete is introduced in the finite element analysis based on the test results. Finite element analysis of push-out specimens results indicate that the normal stress of the section steel is the same on the same cross section and the stress gradient gradually decreases from the loading end to the free end. Specimens with equivalent restraint coefficient γe less than 0.01 will be subjected to split failure and those specimens with the coefficient γe greater than or equal to 0.01 will be subjected to push-off failure. The bearing capacity and slip value obtained by finite element computation is consistent with experiment results. The stress distribution, crack shape and load-deflection curve are analyzed in numerical simulation of SRLC beams. Influence factors involving shear span ratio and position of section steel are considered．Analysis results show that the mechanical properties of the SRLC beams are similar with that of the steel reinforced normal concrete (SRNC)beams. Diagonal shear failure are gradually transformed into flexural failure with the shear span ratio increasing. Load- deflection curve is obviously divided into three stages. Finite analysis results considering the slip between section steel and concrete agree well with the test results, while the capacity and stiffness without considering the slip are bigger than the experimental values.
Downloads
References
Ashraf, A. 2006. Nonlinear analysis of reinforced concrete beam-columns with bond-slip. Journal of Engineering Mechanics, 132(11): 1177-1185.
Chen, Y. S., Zeng, S. H., Jiang, W. S. 2005. Experimental research on the bond stress distribution of deformed reinforcement in the lightweight reinforcement concrete. Journal of Hubei University of Technology, 20(2): 4-7.
Han, T. C., Liang, S. T., Zhu, X. J., Wang, W. K., Yang, J. 2023. Numerical analysis of vertical behavior of large-span prestressed steel reinforced concrete slab. Journal of Southeast University, 53(2): 218-228.
Li, Z., Yuan, X. L., Dong, T. F., Huang, Q., Deng, X. F. 2022. Anti-progressive collapse dynamic effect of RC beam-slab substructure under blast load. Journal of Vibration and Shock, 42(9): 27-46.
Liu, C., He, Y. B. 2002. Experimental study on bond behavior of steel reinforced concrete. Journal of Hunan University. 29(3):168-173.
Lu, C. Y., Wang, W. Y. 2007. Experiment research on bond behavior between deformed bar and lightweight concrete. Journal of Guangxi University, 32(1): 6-9.
Mitchell, D. W., Marzouk, H. 2007. Bond characteristics of high-strength lightweight concrete. ACI Structural Journal, 104(1): 22-29.
Natalli, J. F., Xavier, E. M., Costa, L. C. B., Rodrigues, B. H., Sarmanho, A. M. C., Peixoto, R. A. F. 2021. New methodology to analyze the steel-concrete bond in CFST filled with lightweight and conventional concrete. Materials and Structures, 54(13).
Pecce, M., Ceroni, F., Bibbò, F. A., Acierno, S. 2015. Steel-concrete bond behavior of lightweight concrete with expanded polystyrene. Materials and Structures, 48: 139-152.
Roeder, C. W., Chmielowski, R., Brown, C, B. 1999. Shear connector requirements for embedded steel sections. Journal of Structural Engineering. 125, 142-151.
Shao, Y. J., Mao, X. Y. 2005. Calculation method of bending strength of steel reinforced light aggregate concrete beam. Building Structure, 35(9):45-46.
Tian, J. 2007. The computation of flexural rigidity of SRLC beam. Shanxi Architecture, 33(5): 5-6.
Wang, L. G., Li, L. X., Li, J. X. 2000. Experimental research on the deformation of simply supported steel reinforced light aggregate concrete beams. Journal of Shenyang Architecture and Civil Engineering University, 16(3):179-181.
Wang, L. G., Wang, C. 2005. Experimental study on the shear characteristic of steel encased light aggregate concrete beams. Industrial Construction, 35(1): 65-67.
Wang, P. T., Shah, S. P., Naaman, A. E. 1978. Stress-strain curves of normal and lightweight concrete in compression. J.ACI, 75(11): 603-611.
Xiao, J. Z., Li, P. S., Qin, W. 2006. Study on Bond-slip between recycled concrete and rebars. Journal of Tongji University, 34(1):13-16.
Zhang, J. J. 2005. The bearing capacity of the SRLC beam on the slanting section. Concrete. 2005(2): 39-42.
Zhang, J. W. 2012. The bond stress-strain relationship for steel reinforced lightweight concrete. Mechanics in Engineering, 34(5): 52-56.
Zhang, J. W., Cao, S. Y. 2008. Research on the stress-strain curves of structure lightweight aggregate concrete. Building Science, 24(11): 83-85.
Zhang, Y., Li, X. M., L, H. 1999. Bond behavior study of the steel reinforced high strength concrete structure. Building Structure. 29(7):3-5.
Zhang, Y. J., Ma, Q. G., Guo, J. W. 2019. Analysis of structural parameters of bridge with twin I-shaped steel beams and concrete slabs. Bridge Construction, 49(6): 66-71.
Zeng, L., Xv, C. X., Zheng, S. S., Lv, Y. 2010. Nonlinear finite element analysis on SRHSHPC frame joints. Earthquake Resistant Engineering and Retrofitting, 32(20): 37-41.
Zheng, S. S., Li, L., Deng, G. Z. 2009. Experimental study on bond-slip behavior between shaped steel and HSHP concrete in steel reinforced HSHP concrete beams. Engineering Mechanics, 26(1): 104-111.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2024 jianwen zhang, Fanyu Zhao , Zhipeng Xv
This work is licensed under a Creative Commons Attribution 4.0 International License.
